Expansion-reamer.



W. P. FOUTS & F. B. HOBBS.

EXPANSION REAMER.

APPLICATION FILED MAY 15, 1909.

Patented June 14,1910.

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EXPABISION REMTEE Eetented divine is, 1918?.

Apoiicaticn filed hiey 15, 1999. Serial No. 496,191.

Be ii known that We, WIL" 1AM P. Focus and FRANK B. Hones, cit-izensoi the United States, residing at Cleveland, in the county of Cuyehogs and State of Ohio, have invented certain new and useful Improvementsiu Expeusiou-Resmers, of which the following is syccification.

This invention relates to that type of expension isomers having a central cone and adjustable blades thereon, and has for its object to provide improved means for moving the blades and. for holding the some in piece end for giving fine adjustment thereto, I V The poriiculer construction and advantages oi the scanner will be more fully apparent from ihe following description and the accompanying drawings in which- Figure 1 is a central longitudinal section of the reenter. and 3 are cross secmes --6 of llg. 1,

body 2- is threaded to receive the threaded shank 12 of e drill 12, which is spaced from the rec-moi" :oy en'enlarged neck 12*.

The cutters 9 extend lengthwise of the core 2,, and have cutting edges 9 and inner ribs 9, end are slidehly mounted in grooves 14-. produced in the surface of the core 2. Said grooves are inclined or diverge toward the front end of the tool. The ribs 9 of the cutters hold the some in the grooves, and the inner edge of the cutters, as Well as the ribsi), are inclined tothe some extent or degree as the grooves 14.

The rear end of the core 2 is threaded to receive adjusting out 4: and a jam out 3, respectively having recesses and 3 to receive :2, spanner wrench. 'lhe not, 4t has an holder.-

961,31 115, s ecification of Letters vacant.

To all whom it may concern:

inner annular groove 8 near the front end thereof, forming an inwardly projecting flange 41"., Said nut is also recessed at one side to receive a detachable piece 7 having an inwardly extending promotion 7* at its front end which matches-with and completes the flange s At the inner end of each cutter is an outwardly projecting iiugeuor part 9 which v when the cutters are in place fits within or behind the flange 42 01 in the groove 8. It is obvious that by iurning the out the cuttors are advanced or retracted along the central core or body,- zmd are thus'expanded or contracted.

The fingers 9 are engaged or inserted in the groove'? by removing the piece'7, thus making an opening in the fiange'l", and permitting the cutters to he pushed beck through the opening and behind the flange,

successively as the nut is turned. Whexr they are all inserted and engaged the piece 7 is replaced and fastened in position by its screws. In use, ifthe drill 12- is used, it should be spaced for enough from the reamer to leave the work before the resmer enters. Obviously the meteor can he used Without the drill if desired. To expand the cutters, the

jam out 3 is loosened and the note is turned outwardly, thus advancing the cutters along the cone and expanding the same. Opposite movement of the mic-contracts the cutters. Inasmuch as the degree'oginclination of the grooves lei is small the amount of expansion or contraction is very little in-comparison with the turning movcment'of thenut and consequently a very fine adjustment may be made. -When the cutters are set 'as desired the jam nut is tightened to a We claim r 1. A reamer comprising a tapered grooved stock, cutters slidable in the 1 grooves and having outwardly-extending fingers at their rear ends, and a ringmut screwed on said stock and having internal annular groove receiving said fingers and also having an external recess, and a detachable piece fitting said recess and having an inwerclly extending projection at its front end, substantially as described.

2. A combined resiner and drill comorising a stock with an exiel here extending through the same, and counterbored and threaded at the front end, a drill the shank of which is threaded. and screwed into said counterhore and the head of which abuts the front end (if the stock, means Within Said here to fasten the s0ck..t0 a shank at the rear end thereof, afid cutters on the periphery f said stock.

natures in presence of two Witnesses.

\(VILLIAM P. F OUTS. FRANK B. HOBBS.

In testimohy whereof, we do aflix our Sig-- 

